/iblai-agent-privacy

Add the agent Privacy tab -- detect and filter personally identifiable information (PII) from chat messages. A master "Enable Privacy Router" toggle reveals the action taken when PII is detected (Redact, Mask, or Block), an optional block message, a set of entity-type chips (Person, Email, Phone, SSN, Credit Card, Location, Date/Time, Passport, Driver's License, IP Address, IBAN, Medical License, Bank Number), and an "Also filter AI responses" toggle. This is one tab in the wider agent-settings family. All tabs share the same AgentSettingsProvider wrapper.